Here's a breakdown:

* S: Sulfur

* Se: Selenium

* 2: Indicates there are two selenium atoms for every one sulfur atom.

Selenium disulfide is a solid compound that has a range of applications:

* Anti-dandruff shampoo: It's a common ingredient in anti-dandruff shampoos due to its antifungal properties.

* Veterinary medicine: It's used to treat skin conditions in animals.

* Pigment: Selenium disulfide is a yellow pigment used in paints and plastics.

* Industrial uses: It's used in the production of rubber and plastics.

It's important to note that selenium disulfide is a strong oxidizer and can be harmful if ingested or inhaled.